Save for Canada geese and some other turf-loving animals, lawns offer little habitat to our wild neighbors, who are already at a disadvantage in our urbanizing world. That’s where well-designed lawn alternatives come in.

Wherever they fly—above cities, through suburban backyards, over roads through country fields—birds face an indiscriminate threat. Hurtling toward tall buildings, houses, shopping malls, even automobiles, they're unable to recognize clues like sills or framework that might warn them to change course before they collide with a window.